Whether or not a "safe" version of a recipe can be successfully made often depends on two important factors. First: what is the role of the allergen in the recipe? Second: how many of the recipe's ingredients require substitutions? If the recipe only has 5 ingredients and you need to swap out 4 of them, the end result might bear little resemblance to the original dish. The bottom line: sometimes you can create a "safe" version of a recipe, and sometimes you are better off finding a different recipe altogether.General Kosher Substitutions from kosherscoop.com